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[RFC,bpf-next,10/14] libbpf: add likely/unlikely macros

Message ID 20250318143318.656785-11-aspsk@isovalent.com (mailing list archive)
State RFC
Delegated to: BPF
Headers show
Series instruction sets and static keys | expand

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netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success Errors and warnings before: 26 (+0) this patch: 26 (+0)
netdev/cc_maintainers warning 7 maintainers not CCed: sdf@fomichev.me jolsa@kernel.org song@kernel.org martin.lau@linux.dev haoluo@google.com john.fastabend@gmail.com kpsingh@kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
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Commit Message

Anton Protopopov March 18, 2025, 2:33 p.m. UTC 
A few selftests and, more importantly, a consequent changes to the
bpf_helpers.h file use likely/unlikely macros. So define them here.

Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
---
 tools/lib/bpf/bpf_helpers.h | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h
index 686824b8b413..a50773d4616e 100644
--- a/tools/lib/bpf/bpf_helpers.h
+++ b/tools/lib/bpf/bpf_helpers.h
@@ -15,6 +15,14 @@ 
 #define __array(name, val) typeof(val) *name[]
 #define __ulong(name, val) enum { ___bpf_concat(__unique_value, __COUNTER__) = val } name
 
+#ifndef likely
+#define likely(x)      (__builtin_expect(!!(x), 1))
+#endif
+
+#ifndef unlikely
+#define unlikely(x)    (__builtin_expect(!!(x), 0))
+#endif
+
 /*
  * Helper macro to place programs, maps, license in
  * different sections in elf_bpf file. Section names